/* Tổng quan */
    .page-nhacai88 {
      font-family: 'Arial', sans-serif;
      background-color: #000000; /* Nền đen */
      color: #FFFFFF; /* Chữ trắng */
      line-height: 1.6;
      overflow-x: hidden;
    }

    .page-nhacai88__container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 20px;
    }

    .page-nhacai88__section {
      padding: 40px 20px;
      margin-bottom: 30px;
      border-radius: 8px;
    }

    .page-nhacai88__heading-primary {
      color: #FFD700; /* Vàng */
      text-align: center;
      margin-bottom: 20px;
      font-size: 2.5em;
      font-weight: bold;
    }

    .page-nhacai88__heading-secondary {
      color: #FFD700; /* Vàng */
      text-align: center;
      margin-bottom: 15px;
      font-size: 2em;
      font-weight: bold;
    }

    .page-nhacai88__heading-tertiary {
      color: #FFD700; /* Vàng */
      margin-bottom: 10px;
      font-size: 1.5em;
      font-weight: bold;
    }

    .page-nhacai88__paragraph {
      margin-bottom: 15px;
      color: #FFFFFF;
    }

    .page-nhacai88__list {
      list-style: disc;
      margin-left: 20px;
      margin-bottom: 15px;
      color: #FFFFFF;
    }

    .page-nhacai88__list-item {
      margin-bottom: 8px;
    }

    .page-nhacai88__button {
      display: inline-block;
      background-color: #FFD700; /* Vàng */
      color: #000000; /* Chữ đen */
      padding: 12px 25px;
      border-radius: 5px;
      text-decoration: none;
      font-weight: bold;
      transition: background-color 0.3s ease;
      text-align: center;
      border: none;
      cursor: pointer;
    }

    .page-nhacai88__button:hover {
      background-color: #e6c200; /* Vàng đậm hơn khi hover */
    }

    /* Hero Section */
    .page-nhacai88__hero-section {
      position: relative;
      text-align: center;
      padding-top: 150px; /* An toàn cho header cố định */
      padding-bottom: 50px;
      background-color: #1a1a1a;
      overflow: hidden;
    }

    .page-nhacai88__hero-image {
      max-width: 100%;
      height: auto;
      display: block;
      margin: 0 auto;
      border-radius: 8px;
    }

    .page-nhacai88__hero-content {
      position: relative;
      z-index: 1;
      padding: 20px;
    }

    .page-nhacai88__hero-title {
      font-size: 3em;
      color: #FFD700;
      margin-bottom: 15px;
      line-height: 1.2;
    }

    .page-nhacai88__hero-description {
      font-size: 1.2em;
      color: #FFFFFF;
      margin-bottom: 30px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-nhacai88__hero-cta-button {
      font-size: 1.3em;
      padding: 15px 35px;
    }

    /* Giới thiệu */
    .page-nhacai88__intro-section {
      background-color: #000000;
      text-align: center;
    }

    /* Ưu điểm */
    .page-nhacai88__advantages-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 30px;
    }

    .page-nhacai88__advantage-item {
      background-color: #1a1a1a;
      padding: 25px;
      border-radius: 8px;
      text-align: center;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    }

    .page-nhacai88__advantage-icon {
      max-width: 200px; /* Đảm bảo không phải icon nhỏ */
      height: auto;
      margin-bottom: 15px;
      border-radius: 5px;
    }

    .page-nhacai88__advantage-title {
      color: #FFD700;
      font-size: 1.3em;
      margin-bottom: 10px;
    }

    .page-nhacai88__advantage-text {
      color: #FFFFFF;
    }

    /* Trò chơi phổ biến */
    .page-nhacai88__games-section {
      background-color: #000000;
    }

    .page-nhacai88__games-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 25px;
      margin-top: 30px;
    }

    .page-nhacai88__game-card {
      background-color: #1a1a1a;
      border-radius: 8px;
      overflow: hidden;
      text-align: center;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .page-nhacai88__game-image {
      width: 100%;
      height: 200px; /* Chiều cao cố định cho hình ảnh */
      object-fit: cover;
      display: block;
    }

    .page-nhacai88__game-content {
      padding: 20px;
    }

    .page-nhacai88__game-title {
      color: #FFD700;
      font-size: 1.2em;
      margin-bottom: 10px;
    }

    .page-nhacai88__game-description {
      color: #CCCCCC;
      font-size: 0.9em;
      margin-bottom: 15px;
    }

    .page-nhacai88__game-play-button {
      width: 100%;
      padding: 10px 0;
      font-size: 1em;
    }
    
    .page-nhacai88__game-provider-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); /* Điều chỉnh minmax cho logo */
      gap: 20px;
      margin-top: 40px;
      justify-items: center;
    }

    .page-nhacai88__game-provider-item {
      background-color: #1a1a1a;
      padding: 15px;
      border-radius: 8px;
      text-align: center;
      box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    }

    .page-nhacai88__game-provider-logo {
      max-width: 200px; /* Đảm bảo kích thước tối thiểu */
      height: auto;
      display: block;
      margin: 0 auto;
      filter: grayscale(100%); /* Làm mờ logo để nổi bật hơn */
      transition: filter 0.3s ease;
    }

    .page-nhacai88__game-provider-logo:hover {
      filter: grayscale(0%); /* Hiển thị màu khi hover */
    }

    /* Hướng dẫn tham gia */
    .page-nhacai88__how-to-join-section {
      background-color: #000000;
      text-align: center;
    }

    .page-nhacai88__steps-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 30px;
    }

    .page-nhacai88__step-item {
      background-color: #1a1a1a;
      padding: 25px;
      border-radius: 8px;
      text-align: center;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    }

    .page-nhacai88__step-number {
      background-color: #FFD700;
      color: #000000;
      border-radius: 50%;
      width: 50px;
      height: 50px;
      display: flex;
      justify-content: center;
      align-items: center;
      font-size: 1.8em;
      font-weight: bold;
      margin: 0 auto 20px;
    }

    .page-nhacai88__step-title {
      color: #FFD700;
      font-size: 1.3em;
      margin-bottom: 10px;
    }

    .page-nhacai88__step-description {
      color: #FFFFFF;
    }

    /* Khuyến mãi */
    .page-nhacai88__promotions-section {
      background-color: #000000;
      text-align: center;
    }

    .page-nhacai88__promotion-card {
      background-color: #1a1a1a;
      padding: 30px;
      border-radius: 8px;
      margin-top: 30px;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
      max-width: 600px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-nhacai88__promotion-title {
      font-size: 2em;
      color: #FFD700;
      margin-bottom: 15px;
    }

    .page-nhacai88__promotion-text {
      font-size: 1.1em;
      color: #FFFFFF;
      margin-bottom: 25px;
    }

    .page-nhacai88__promotion-cta-button {
      font-size: 1.2em;
      padding: 15px 30px;
    }

    /* FAQ Section */
    .page-nhacai88__faq-section {
      background-color: #000000;
    }

    .page-nhacai88__faq-list {
      margin-top: 30px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-nhacai88__faq-item {
      background-color: #1a1a1a;
      border-radius: 8px;
      margin-bottom: 15px;
      overflow: hidden;
      box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    }

    .page-nhacai88__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 20px;
      background-color: #2a2a2a;
      cursor: pointer;
      user-select: none;
      transition: background-color 0.3s ease;
    }

    .page-nhacai88__faq-question:hover {
      background-color: #3a3a3a;
    }

    .page-nhacai88__faq-question h3 {
      color: #FFD700;
      margin: 0;
      font-size: 1.1em;
      pointer-events: none; /* Ngăn chặn sự kiện click trên h3 */
    }

    .page-nhacai88__faq-toggle {
      color: #FFD700;
      font-size: 1.5em;
      font-weight: bold;
      pointer-events: none; /* Ngăn chặn sự kiện click trên toggle */
      transition: transform 0.3s ease;
    }

    .page-nhacai88__faq-item.active .page-nhacai88__faq-toggle {
      transform: rotate(45deg); /* Xoay dấu + thành X hoặc - */
    }

    .page-nhacai88__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 15px;
      color: #CCCCCC;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      opacity: 0;
    }

    .page-nhacai88__faq-item.active .page-nhacai88__faq-answer {
      max-height: 2000px !important; /* Đảm bảo đủ lớn cho mọi nội dung */
      padding: 20px 15px !important;
      opacity: 1;
    }

    /* Final CTA */
    .page-nhacai88__cta-section {
      background-color: #000000;
      text-align: center;
      padding-top: 50px;
      padding-bottom: 50px;
    }

    .page-nhacai88__cta-title {
      font-size: 2.2em;
      color: #FFD700;
      margin-bottom: 20px;
    }

    .page-nhacai88__cta-button {
      font-size: 1.4em;
      padding: 18px 40px;
    }

    /* Responsive adjustments */
    @media (max-width: 768px) {
      .page-nhacai88__container {
        padding: 10px;
      }

      .page-nhacai88__hero-section {
        padding-top: 150px; /* Vẫn giữ padding an toàn */
        padding-bottom: 30px;
      }

      .page-nhacai88__hero-title {
        font-size: 2.2em;
      }

      .page-nhacai88__hero-description {
        font-size: 1em;
      }

      .page-nhacai88__hero-cta-button {
        font-size: 1.1em;
        padding: 12px 25px;
      }

      .page-nhacai88__heading-primary {
        font-size: 2em;
      }

      .page-nhacai88__heading-secondary {
        font-size: 1.6em;
      }
      
      .page-nhacai88__advantage-item,
      .page-nhacai88__game-card,
      .page-nhacai88__step-item {
        padding: 20px;
      }

      .page-nhacai88__game-image {
        height: 180px;
      }

      .page-nhacai88__promotion-title {
        font-size: 1.6em;
      }

      .page-nhacai88__promotion-text {
        font-size: 1em;
      }

      .page-nhacai88__promotion-cta-button {
        font-size: 1.1em;
        padding: 12px 25px;
      }

      .page-nhacai88__faq-question {
        padding: 12px 15px;
      }

      .page-nhacai88__faq-question h3 {
        font-size: 1em;
      }

      .page-nhacai88__faq-answer {
        padding: 0 10px;
      }
      .page-nhacai88__faq-item.active .page-nhacai88__faq-answer {
        padding: 15px 10px !important;
      }

      .page-nhacai88__cta-title {
        font-size: 1.8em;
      }

      .page-nhacai88__cta-button {
        font-size: 1.2em;
        padding: 15px 30px;
      }

      /* Responsive image optimization */
      .page-nhacai88 img {
        max-width: 100% !important;
        height: auto !important;
      }
      .page-nhacai88__hero-image,
      .page-nhacai88__advantage-icon,
      .page-nhacai88__game-image,
      .page-nhacai88__game-provider-logo {
        width: 100% !important;
        max-width: 100% !important;
        overflow: hidden !important;
        box-sizing: border-box !important;
      }
    }